I got back to the dashboard!
Finally I deleted all plugins with ftp access, which got to do with login and it worked again.
At the end of the day this have been the following plugins:
– bulletproof-security
– limit-login-attempts
– rename-wp-login
– wp-login-security-2
– s8-custom-l…egistration
Another question: How do I delete the URL in the initial post in this forum?
Can´t find a way do edit posts here.
Thanks for your help!
Mike